Very good article indeed. Although centred around the US there is plenty in it for everyone. nytimes.com/2020/03/22/hea…
Next mobile CT scanners used to check for ground glass opacity (a feature of COVID.
Only then a test.
You might then be sent to a hotel
Some cities offered bounties to those that turned in CV19 sufferers
Others rewarded those who came in for tests
In Singapore classes photos are taken to aid tracing if one has CV